1212031721603 has 2 divisors, whose sum is σ = 1212031721604. Its totient is φ = 1212031721602.

The previous prime is 1212031721599. The next prime is 1212031721609. The reversal of 1212031721603 is 3061271302121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212031721603 - 2² = 1212031721599 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212031721609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606015860801 + 606015860802.

It is an arithmetic number, because the mean of its divisors is an integer number (606015860802).

Almost surely, 2^{1212031721603} is an apocalyptic number.

1212031721603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212031721603 is an equidigital number, since it uses as much as digits as its factorization.

1212031721603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The spelling of 1212031721603 in words is "one trillion, two hundred twelve billion, thirty-one million, seven hundred twenty-one thousand, six hundred three".